Hey all I'm looking for an opinion on which of these wheels would be the best for my current build (personal bike so best wheels, I don't care about breaking the MA40 wheelset and using mismatched wheels):

Fronts:

1: Mavic MA40 rim, Exage sport hub, non magnetic rim and non magnetic spokes

2: Mavic 190 FB rim, HB-RM500E hub, non magnetic rim and magnetic spokes

Rears:

3: Mavic MA40 rim, Exage sport hub, non magnetic rim and non magnetic spokes

4: Ambrosio 19 Extra Elite Durex rim, Touring hub, non magnetic rim and non magnetic spokes

I also have videos of both rear cassettes/freewheels as I'm not sure which type they are. It seems I can't post them here or post a link so I hope this doesn't get me banned:
1/ imgur com/a/X5pqCSG
2/ imgur com/a/WHlSdl2
3/ imgur com/a/V71XzT2
4/ imgur com/a/snFbczx

How many gears are you looking to use? 7?8?9?

What use?

I'm planning on using 7 for commuting and occasionally longer rides.

Haha I would prefer to keep the mavic MA40s as is but if the others are more reliable or MA40s are known as crappy low end wheels then I won't mind using mixed.

My only experience with Ambrosio 19 Extra Elite Durex rims has been ... exceedingly bad. I have a pair laced to really nice Phil hubs, and nothing fits these rims. I managed to get a 27" tire seat ok on one, but not the other (too loose), none of the 700c tires I've tried have ever gone onto either (waaaay too tight). I've heard tell of other folks complaining about the inconsistent, nonstandard sizing of these things.

If you're thinking of using them, make sure you've got a pair that will fit some tires you have. That may make your decision easier.

Is non-magnetic another way of saying aluminum rims with stainless steel spokes? Only thing I found after googling magnetic spokes were cracks about the earth’s forces and wearing a foil beanie

I built a set of Ambrosio 19 Extra Elite Durex wheels and heard the same warnings about how difficult it is to mount tires on them. I’ve only had one set of tires on these wheels but the Conti gp4000s I used mounted fine. I did leave them basking in the sun for 15 minutes which always seems to make it easier.

Exactly.

If you ever get a flat while riding, you'll be thankful you chose a rim-tire combination that facilitates easy mounting/dismounting. This is why I cannot recommend Campagnolo Omega rims, which are a very tight fit with almost any tire. It takes only a small fraction of a millimeter in outer flange diameter to make a huge difference in mountability.

A related tip: If you use innertubes, avoid foldable tires and tires designed for tubeless applications, because these tend to have an even tighter fit. Pre-stretching helps somewhat, as does, as plonz suggests, solar warming. I do both. Also, before riding, take the tires off the rims and remount them, to loosen them up a bit further.

Mavic MA40s are an incredibly durable rim. With the present Exage hubs I am pretty sure you can do 8 at least as well.

Those would be what I would opt for if I were making the decision.

Thanks everybody for your answers.
I'm gonna go with the Mavic MA40s